# 变量
teacher = "小甲鱼"
print(teacher)
teacher = '老甲鱼'
print(teacher)

x = 3
x = 5
y = 8
z = x + y
print(z)

myteacher = '小甲鱼'
yourteacher = '老甲鱼'
ourteacher = myteacher + yourteacher
print(ourteacher)
# 注意：在使用变量之前，需要对其先赋值

# 字符串
# print('520' + '1314')
# print(520 + 1314)
